5-11
COMPONENTS
TEST PROCEDURE
RESULTS
Disconnect the 8 pin
connector from P.C.B.
(Refer to schemetic diagram)
RELAY 2, RELAY 3
OF P.C.B.
(Wire leads removed.)
Note: Relay
Relay 2: Microwave
Relay 3: Grill
FAN MOTOR
(Wire leads removed)
TURNTABLE
MOTOR
(Wire leads removed)
Check for P.C.B. connector.
Measure the resistance.
(Ohm-meter scale: R x 1)
Measure the resistance.
(Ohm-meter scale: R x 1000)
Normal: Approx. 200 ~400 ohm
Abnormal: Infinite or several
ohm.
Normal: Approx. 10~20 kohm
Abnormal: Infinite or several
ohm.
NOTE : • A MICROWAVE LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
• MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
• WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE
CONNECTOR, NOT THE WIRES.
A
B
Cooking Start OFF
1
3
5
Relay 2
Relay 3
Cooking Start OFF
A Approx. 30 ~ 50 ohm
B Approx. 300 ~ 500 ohm
Summary of Contents for MB-4042G
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 29: ...6 2 13536A 13581A 14970A 14026A 13552A 13213A 14890A 13720D DOOR PARTS ...
Page 30: ...6 3 23506A 23572A 268711 WTT028 24781M CONTROL PANEL PARTS ...
Page 32: ...6 5 466001 43500A 44510A 466001 WSZ085 466003 LATCH BOARD PARTS ...
Page 34: ...6 7 WTT021 63302A 63303A WSZ002 65006B 56170D BASE PLATE PARTS ...
Page 37: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 38: ...8 2 PRINTED CIRCUIT BOARD ...
